Philippe Ricaud

  • Citations Per Year
Learn More
We present a new compact and automated groundbased microwave mobile radiometer dedicated to the study of middle atmospheric water vapor, which is convenient for measurement, intercomparison, and validation campaigns, particularly in remote places. The instrument detects the 616−523 H2O transition line at 22.235 GHz by means of balanced beam-switching(More)
The H2O Antarctica Microwave Stratospheric and Tropospheric Radiometers (HAMSTRAD) program aims to develop two ground-based microwave radiometers to sound tropospheric and stratospheric water vapor (H2O) above Dome C (Concordia Station), Antarctica (75◦06′S, 123◦21′E, 3233 m asml), an extremely cold and dry environment, over decades. By using(More)
The investigation of the Martian atmosphere is of key importance for an understanding of the planets present and past. Passive limb observations of thermal radiation at submillimeter wavelengths in the 320-350-GHz range by use of a state-of-the-art satellite receiver on a low Mars orbit allow important parameters such as the mixing ratios of H2O, HDO, 12CO,(More)
J.-P. Pommereau, A. Garnier, G. Held, A.-M. Gomes, F. Goutail, G. Durry, F. Borchi, A. Hauchecorne, N. Montoux, P. Cocquerez, G. Letrenne, F. Vial, A. Hertzog, B. Legras, I. Pisso, J. A. Pyle, N. R. P. Harris, R. L. Jones, A. Robinson, G. Hansford, L. Eden, T. Gardiner, N. Swann, B. Knudsen, N. Larsen, J. Nielsen, T. Christensen, F. Cairo, M. Pirre, V.(More)
The HAMSTRAD microwave instrument operates at 60 and 183 GHz and measures temperature and water vapor, respectively, from 0to 10-km altitude with a time resolution of 7 min. The radiometer has been successfully deployed at Dome C (Concordia Station), Antarctica (75◦06′ S, 123◦21′ E, 3233 m amsl) during the first summertime campaign for 12 days in(More)
The high altitudes and extremely low temperatures of the Antarctic plateau result in an exceedingly low atmospheric water vapor content. In this article we estimate the precipitable water vapor at Dome A using optical spectra of the diffuse solar irradiance in the zenith direction. The spectra were obtained from the Nigel spectrometer at Dome A during 2009.(More)